At that time, to the one-way map which I received
I drew my endless dreams with my reckless fingers
An empty castle
I'm sure the answer is a story that's been left behind in the past
And regret is now an endless flow of sand sliding down my palm
Running through (my fingers)

Lyrics from Animelyrics.com

hotsureta ito mou kaerenai to
tsumetai yoru yuka ni toketeku

Lyrics from Animelyrics.com

This frayed string (is a sign that) I can never return
As it unravels on the floor on a cold night

At that time, to the one-way map that I lost
Here I'm looking for the eternity I had drawn
Even if I withered away while doing that
The answer is the story that I'm really reading now
And even my scars haven't dried up, because in their trails, (a river of) pain and heat
Is flowing slowly

At that time, to the one-way map which I received
I drew my endless dreams with my reckless fingers
An empty castle
The answer is the story that I'll be reading onwards (till the end)
Walking along pathless paths, searching for the castle of sand
Never to return